John l



J. L. DRAKE.

Lamp.

Patented Sept. 20, 1859.

Invenwr:

Witnesses:

N. PETERS. wmmunm n her. Washingtun. D c.

UNITED STATES PATENT OFFICE.

JOHN L. DRAKE, OF CINCINNATI, OHIO.

LAMP.

Specification of Letters Patent No. 25,493, dated September 20, 1859.

To all whom it may concern:

Be it known that I, JOHN L. DRAKE, of Cincinnati, in the county ofHamilton and State of Ohio, have invented a new and Improved Lamp; and Ido hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, in which Figure l, is a verticalcentral section of my invention. Fig. 2, is a detached external View ofa portion of ditto. Fig. 3, is a plan or top view of the cap and chimneyholder of ditto. Fig. 4, is a plan or top view of the part shown in Fig.2.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to an improvement in that class of lamps that aredesigned for burning for illuminating purposes, coal oils, of theheavier grades and other hydro-carbons which require a considerableamount of oxygen to support a proper combustion.

The object of the within described invention is to make suitableprovisions, whereby the flame may be supplied with a requisite amount ofwarm oxygen to feed the flame and at the same time the top or cap bekept in a sufficiently cool state to permit the same to be detached bythe fingers for the purpose of trimming the wick or supplying the fontwith oil.

To enable those skilled in the art to fully understand and construct myinvent-ion I will proceed to describe it.

A, represents the body of the lamp top. This body is of cylindrical formand is struck up or swaged in suitable form from metallic plate. Thelower end of the body A, has a screw thread a, cut on it and the body A,above the screw a, is perforated as shown at b. In the upper part of thebody A, a horizontal flanch c, is placed, and attached to the body, saidflanch having a circular opening (Z, through which the wick tube B,passes, the lower end of the wick tube being attached to the bottom ofthe body A.

The wick tube B, extends some distance above the body A, and isconstructed with a view of retaining a plurality of wicks for thepurpose of augmenting capillarity and thereby insuring a full supply ofoil to the flame. This wick tube does not in this place require adetailed description as it was patented by me May 17th 1859, and besidesan I ordinary wick tube may be used with the parts comprising thisinvention.

On the upper part of the body A, at two opposite points of its peripherythere are projections e, e, the use of which will be presently shown.

C, represents a cap which is of the usual dome-shapeand D, is thechimney holder which is of annular dish-form encompassing the lower partof the cap. The cap and holder are struck up or swaged from a singlepiece of metal plate. The top of the cap is slotted as usual as shown atf, and the chimney holder D, is perforated near the base of the cap asshown at 9, see Figs.

.1 and 3. The lower part of the cap C, at

its junction with the chimney holder D, has right angular slots h, madein it at opposite points of its periphery and the cap O, and holder D,are secured to the body A, in consequence of the projections e, e,fitting in the slots h, see more particularly Fig. 1.

011 the wick tube B, a circular disk E, Y

is placed. This disk is some distance below the top of the cap O, anddoes not touch its sides, a space i, being allowed all around the diskbetween it and the cap to permit air to ascend to the flame. The disk E,need not be permanently attached to the wick tube but fitted snugly onit so that it may be readily removed when necessary.

In the body A, of the lamp top a shaft j, is placed horizontally, saidshaft having a thumb wheel 71', on one end and small toothed wheels Z,Z, near its opposite end. The wheels Z, Z, bear against the wick andraise and lower it as may be required by turning the shaft.

The operation is as follows: The flame is supplied with two currents ofair, one passing through the perforations 6, up into the cap O, andbeing spread by the disk E, strikes against the interior of the cap C,and is deflected from thence so as to impinge against the flame at itsbase. The other current passes through the perforations g, and upbetween the glass chimney and the cap C, and impinges against the sidesof the flame. The disk E, causes the curone that is unimpeded in itscourse. In this latter respect the effect is quite similar to thatproduced. by wire gauze or a perforated division plate which have beenused for such purposes, although applied in a different way from thatherein shown and of course without the important feature of alternatingor spreading out the current of air in its passage to the flame. Byhaving the holder D, perforated at the base of the cap and the holderand cap connected and arranged as shown a large supply of air isadmitted to the flame at its outer sides and the exterior of the holderis kept in a cool state so that the fingers may be applied to it and thetop unscrewed from the font while the lamp is burning. This is animportant feature of the invention for in all lamps for similar purposesthat have passed under my observation, a considerable The employment oruse of the disk E, ap-.

plied to the wick tube B, and used in connection with the cap C, andarranged relatively with it for the purpose set forth.

JOHN L. DRAKE.

WVitnesses R. S. SPENCER, J. W. COOMBE.

